Japan Anime Ratings: Slime Season 4 and Bookworm Maintain Their Top Spots
It has been a very busy week for the anime world in Japan! The television ratings for the week of April 6-12, 2026, have been announced, and the beloved isekai series That Time I Got Reincarnated as a Slime (Tensura) and Ascendance of a Bookworm (Honzuki no Gekokujou) continue to maintain their strong standing on the list. According to Anime News Network data, Slime held onto its 4th place spot with its 4th season, while the highly anticipated Part 3 of Bookworm remained at 7th place.
Things are bigger than ever on the That Time I Got Reincarnated as a Slime front. Premiering on April 3, 2026, the 4th season stands out as the most ambitious project in the series' history. Produced by Studio 8bit, this new season is planned as a massive marathon spanning a total of 5 "cours" (approximately 56 episodes). As the first two cours air back-to-back, we are watching the most critical stages of the alliance Rimuru Tempest is trying to build between monsters and humans. Fans seem particularly pleased with the increasing political tension brought on by the introduction of new characters like Maribel Rozzo.
On the other hand, this season is a true turning point for Ascendance of a Bookworm. The legendary WIT Studio, which took over the animation duties from Ajia-do, is bringing the "Adopted Daughter of an Archduke" arc to the screen. This new era, where Myne steps into the world of nobility under the name Rozemyne, deserves its place in the ratings with both its visual quality and deepening world-building. The return of one of the most beloved chapters of series creator Miya Kazuki's 33-volume main story with such high-quality production has kept the core fanbase glued to their screens.
The Spring 2026 season is essentially witnessing a battle of the titans. The list includes very strong competitors such as Re:Zero Season 4, new episodes of Classroom of the Elite, and Hiromu Arakawa's new work Daemons of the Shadow Realm. In such an intense competitive environment, Slime and Bookworm maintaining their spots in the top 10 without wavering proves the unshakable popularity of both series among Japanese viewers. In particular, Slime's long-term 5-cour broadcast plan suggests it could climb even higher in the ratings in the coming months of the season.
So, what awaits us in the coming weeks? While the level of action increases on the Slime front, we will be approaching Rozemyne's first steps at the magic academy in Bookworm. If this stability continues, it seems we will continue to see these two giants among the most-watched productions of 2026. Who do you think will be talked about more by the end of the season, Rimuru or Rozemyne? We look forward to your comments!
